INTERNATIONAL JOURNAL OF APPLIED EXERCISE PHYSIOLOGY, cilt.9, sa.12, ss.92-98, 2020 (Hakemli Dergi)
This study aimed to examine the effectiveness of impact protection of body protectors, which are
mandatory to be used in Karate Kumite competitions. The research was conducted on three different body
protectors approved by the World Karate Federation (WKF) for use in official competitions. Testing was
performed both with high- and low-energy impacts applied on the body protectors using a specially
designed setup, and the average values of acceleration, force, pressure, impulse, and impact area were
calculated.
The three body protectors differed in their ability to suspend both low- and high-energy impacts
(p<0.05). For low-energy impacts, the three different brands of body protectors (A, B and C respectively)
decreased impact acceleration by 4.98% (A), 5.37% (B), 7.23% (C); impact force by 22.56% (A), 30.91% (B),
54.71% (C); impact pressure by 19.10% (A), 26.86% (B), 20.57% (C), and impact impulse by 37.07% (A),
41.31% (B), 66.02% (C). For high-energy impacts, acceleration decreased by 5.34% (A), 6.75% (B), 11.23% (C);
impact force by 27.81% (A), 5.15% (B), 25.33% (C); pressure by 28.52% (A), 14.47% (B), 22,56% (C); and
impulse by 28.67% (A), 5.68% (B), 20.20% (C). In conclusion, the significant differences between the different
body protectors may result in the ineffective suspension of applied impact during the competition, especially
during high energy contacts. The manufactures have to provide sport-specific solutions for the nonlinear
and inadequate suspension behavior of these body protectors.
Keywords: Karate, Kumite, Injury, Protective equipment.